I am not 100% sure but I think something has changed when the Jitsi client
shuts down. Before the Windows client would shut down and send a Expire:0
in the PUBLISH and a different Jitsi client that was a Subscriber of the
first client would see that the first client was offline. Now I am not
seeing this. When the first client shuts down the second client still
thinks the first client is still ONLINE.
Here is a SIPtrace showing whats going on